Insertion tool



FIG. 1 is top, front and right-side perspective view of an insertion tool showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the insertion tool that forms no part of the claimed design. 

CLAIM The ornamental design for an insertion tool, as shown and described. 